Question

1. the largest igneous intrusion is called a(n) ____.

obsidian
sill
batholith
dike

Explanation:

Obsidian is a volcanic glass, not an intrusion. A sill is a tabular - shaped intrusion parallel to rock layers. A dike is a sheet - like intrusion that cuts across rock layers. A batholith is the largest type of igneous intrusion, covering a large area (more than 100 square kilometers).

Answer:

C. batholith